JP5541702B2 - Video processing apparatus and control method thereof - Google Patents

Description

  The present invention relates to a video processing apparatus and a control method thereof.

  When a user views a video using a video display device such as a television device (hereinafter referred to as a television), it is necessary to set the image quality so that the video is easy to see depending on the ambient brightness and lighting environment. For example, when the periphery of a television screen is dark, it is easier to see the video when the video is displayed with reduced brightness. In addition, when the surroundings of the television screen are bright, it is easier to see the video when the video is displayed with high brightness. The same applies to the color temperature around the TV screen, not limited to the surrounding brightness. When the color temperature around the TV screen is low, it is easier to view the video when the color temperature of the video is also reduced. In addition, when the color temperature around the television screen is high, it is easier to view the video when the video is displayed with a high color temperature. Therefore, it is conceivable to automatically adjust the image quality of the video displayed on the television screen according to the brightness and color temperature around the television screen.

  However, televisions are often used in situations where the environment around the television screen changes frequently. Specifically, it may be used in an environment where the lighting is switched or the incident state of sunlight changes in the room where the television is installed by opening and closing the curtain. Under such an environment, if the image quality is automatically adjusted according to the brightness of the surroundings of the television screen, the image quality of the television screen is frequently switched following the frequent changes in the surrounding environment. As a result, there is a problem that the user feels uncomfortable.

  The following Patent Document 1 discloses a technique for detecting the illuminance around the television, determining the display luminance of the television according to the detected illuminance, and changing the display luminance to the determined display luminance over a plurality of stages. doing.

JP 2004-279503 A

  However, in the technique disclosed in Patent Document 1, since the display brightness is changed in a plurality of stages, it takes time to switch to the optimum image quality when the ambient brightness is changed. This is effective in suppressing the user's uncomfortable feeling caused by a sudden change in image quality. However, for example, when the user switches the channel to a movie program and the illumination is intentionally darkened immediately after the channel is switched in order to make it easy to see the video of the movie program, the above-described technique causes a problem. In such a case, with the technique disclosed in Patent Document 1, it takes time until the video can be displayed with an image quality adapted to the dark illumination after the user intentionally dims the illumination. In other words, the technique of Patent Document 1 always changes in a stepwise manner with a certain degree of change regardless of whether the ambient brightness or color temperature is changed as desired by the user or not. It will be. In such control, it is difficult to say that appropriate control according to the user's intention is achieved.

According to the present invention, when performing image quality adjustment processing for video signals in stages according to changes in the lighting environment, the user can change the lighting environment within a predetermined time after the channel is switched or the program being viewed changes. Provided is a video processing apparatus that performs the following processing when it is considered that a change has occurred.
The video processing apparatus of the present invention increases the adjustment amount per unit time so that the adjustment time to the image quality suitable for the lighting environment after the change is shortened.

A video processing apparatus according to an embodiment of the present invention is a video processing apparatus that performs image quality adjustment processing on a video signal in accordance with external light, and includes external light detection means that detects external light, and the video processing apparatus. Switching detection means for detecting any switching processing among video signal input switching, channel switching, and broadcast program switching, and measurement for measuring the time after switching processing is detected by the switching detection means. and means, based on the target setting value that is set according to the outside light detected by the external light detecting means, and an image processing means for executing image quality adjustment processing of the video signal, detected by the pre-Symbol outside light detecting means change timing of external light is, when the switching detection means is before the predetermined time has elapsed from the detection of the switching process, before than otherwise A control means for controlling so as to increase the responsiveness of the image quality adjustment processing by the image processing means.

  According to the video processing apparatus of the present invention, the following processing can be performed when performing the image quality adjustment processing for the video signal stepwise in accordance with the change in the lighting environment. That is, when the user switches channels or when the program being viewed changes, and the user thinks that the user has changed the lighting environment within a predetermined time, the adjustment time to the image quality suitable for the changed lighting environment So that the adjustment amount per unit time can be increased. As a result, user convenience can be improved.

It is a figure which shows the structural example of the video processing apparatus which concerns on Example 1 of this invention. It is a figure explaining the operation | movement process of the video processing apparatus which concerns on Example 1. FIG. It is a figure explaining the state of control concerning Example 1. FIG. It is a figure which shows the structural example of the video processing apparatus which concerns on Example 2, and the example of genre determination information. 10 is an example of an operation processing flow of the video processing apparatus according to the second embodiment.

  FIG. 1 is a diagram illustrating a configuration example of a video processing apparatus according to the first embodiment of the present invention. A video processing apparatus 100 shown in FIG. 1 is a video processing apparatus capable of performing image quality adjustment processing on a video signal in stages according to the surrounding outward direction. The video processing apparatus 100 is a television, for example. The video processing apparatus 100 includes an input switching detection unit 101, an external light detection unit 102, an external light change determination unit 103, a time measurement unit 104, a control unit 105, an image processing unit 106, and a display unit 107. The input switching detection unit 101 detects execution of switching of an input video signal (input signal) and execution of a channel selection operation (channel switching), and uses the detection result as signal switching information to the time measurement unit 104. Send. The switching of the input video signal is, for example, switching from a video signal output from a recorder connected to the video processing apparatus 100 to a broadcast signal received by the television. The channel switching is a process for switching the channel that the user is viewing. Note that the input switching detection unit 101 can also detect switching of broadcast programs in addition to execution of these switching. Switching of a broadcast program is a state in which no signal switching or channel switching occurs, but a program being broadcast on a certain channel is finished, and then a new program broadcast is started. That is, the input switching detection unit 101 is a switching detection unit that detects any switching process among switching of input of video signals to the video processing apparatus 100, switching of channels, and switching of broadcast programs.

  The external light detection unit 102 periodically detects light around the video processing apparatus 100 and transmits the detected light to the external light change determination unit 103 as external light information. In order to simplify the description, the external light detected by the external light detection unit 102 is ambient illuminance (brightness) in this embodiment. However, the present invention is not limited to brightness, and color temperature may be detected. Further, the external light detection unit 102 may detect both illuminance and color temperature. That is, the external light detection unit 102 detects external light information including at least the illuminance or color temperature around the video processing apparatus 100. Note that the illuminance is continuously detected even when there is no change in the external light or when the degree of change in the illuminance is less than a predetermined specified value. The external light change determination unit 103 receives external light information from the external light detection unit 102, and based on the received external light information, an external light change amount indicating the magnitude of change in illuminance around the video processing device 100. calculate. This can calculate the amount of change in external light (illuminance) by obtaining the difference between the external light information that has already been detected and the external light information that is currently detected.

  Then, the external light change determination unit 103 compares the calculated external light change amount with a determination threshold value for the external light change amount set in advance in the circuit. The external light change determination unit 103 determines that the external light has changed, that is, the illuminance around the video processing apparatus 100 has changed when the external light change amount is larger than the determination threshold. Then, in order to adjust the image quality according to the changed external light, external light information indicating the current illuminance is output to the control unit 105. That is, the external light detection unit 102 and the external light change determination unit 103 function as external light detection means that detects external light information and determines changes in ambient external light according to the detected external light information.

  The time measuring unit 104 functions as a timer that receives the signal switching information from the input switching detection unit 101 and measures the time after receiving the signal switching information. The time after receiving the signal switching information is sequentially measured, and the measured time is constantly output to the control unit 105. When new signal switching information is received during measurement, the measurement time up to that time is reset, and time measurement is started again. That is, the time measurement unit 104 functions as a measurement unit that measures the time after the switching process is detected by the switching detection unit (input switching detection unit 101).

  When the outside light change determination unit 103 recognizes that ambient ambient light has changed, the control unit 105 uses the outside light information output from the outside light change determination unit 103 to target the outside light. The brightness value (target set value) is determined. The target luminance value corresponds to the luminance value of the video displayed on the display unit 107 of the video processing device 100. The target set value is used for image processing for displaying a video signal with an image quality corresponding to the changed external light. The target luminance value is determined in advance according to the ambient illuminance, and is stored in a storage unit (not shown) in the control unit 105 as table data. For example, when the illuminance around the video processing apparatus 100 is 400 lux, the correspondence is determined such that the luminance value of the video displayed on the display unit 107 is 150 candela. In this embodiment, it is assumed that the image quality is adjusted so that the luminance of the video data to be displayed becomes the target luminance value, but the display can also be performed by controlling the backlight of the display unit 107 that displays the video data. It is possible to adjust the brightness of the image. Further, for other parameters such as the color temperature in addition to the luminance, a target set value corresponding to each adjustment content is determined as a target color temperature (target color temperature).

  The control unit 105 uses the external light information output from the external light change determination unit 103 to determine a target luminance value corresponding to the external light information from the table data, and an image is displayed with the determined target luminance value. As described above, the luminance value of the video data is adjusted. At this time, in general, instead of immediately switching to the target luminance value, the luminance value is temporarily switched to a luminance value between the current luminance value and the target luminance value, and controlled so as to gradually approach the target luminance value. To do. Specifically, when the video data is composed of 60 frame images per second, the luminance value may be changed in units of 3 frames. At this time, the change amount of the luminance value to be changed (adjustment amount per unit time) is generally changed by a predetermined fixed value. For example, the luminance value of the video data is adjusted so as to gradually approach the target luminance value with an adjustment amount of 1 candela per 3 frame units.

  However, as described above, the ambient illuminance may be changed by one's own intention immediately after the user switches the input of the video signal or switches the channel. This is because, for example, the user is viewing a room brightly in order to view a sports program. This is because sports programs have a lot of vivid colors, and a higher sense of realism can be obtained by viewing them with clear brightness. However, when the user switches channels or the like for the purpose of watching a movie, the user often turns off the room lighting. This is because it is preferable to watch movies with the surroundings as dark as possible, as is apparent from the dark environment of the movie theater. Therefore, when the video is switched from the sports program to the movie program and the user dims the room lighting immediately after that, the illuminance changes greatly, so that the luminance value of the video needs to be changed greatly.

  As described above, in normal image quality adjustment, the control unit 105 performs adjustment so that the target luminance value is obtained with an adjustment amount per unit time. However, when the user changes the illuminance by his / her own intention immediately after switching the video. Is preferably adjusted so that the image quality corresponding to the illuminance is as early as possible. This is because the user wants to enjoy viewing the program he / she desires with brightness suitable for the program.

  Therefore, the control unit 105 determines whether or not a change in external light has occurred before the elapsed time from the occurrence of signal switching reaches a predetermined time threshold Th1. When the change in outside light occurs before the elapsed time reaches the time threshold value Th1, the control unit 105 increases the adjustment amount per unit time compared to the normal case, and reaches the target luminance value in a short time. To control the image quality adjustment. The normal case is a case where a change in external light occurs after a time equal to or greater than the time threshold Th1 has elapsed. In this case, as described above, image quality adjustment is performed with an adjustment amount of 1 candela per 3 frame units, for example. This adjustment amount is referred to as an adjustment amount A1 for convenience of explanation. On the other hand, when a change in external light occurs before reaching the time threshold Th1, for example, image quality adjustment is performed with an adjustment amount of 10 candela per 3 frame units. This adjustment amount is referred to as an adjustment amount A2 (A1 <A2) for convenience of explanation. In this case, the target luminance value can be set at a speed 10 times faster than in the normal case.

  The control unit 105 outputs, to the image processing unit 106, image quality control information including information on the target luminance value of image processing for the video signal executed by the image processing unit 106. However, if it is necessary to increase the adjustment amount per unit time, the image quality control information is output including an instruction to increase the adjustment amount per unit time. That is, this instruction means that adjustment is performed using the adjustment amount A2. That is, the control unit 105 determines whether or not the change timing of the external light detected by the external light detection unit is before a predetermined time elapses after the input switching detection unit 101 detects the switching process. Determine based on the measurement result. As a result of the determination, if the change timing of the external light is before the predetermined time has elapsed, the control unit 105 increases the adjustment amount per unit time so as to execute the image quality adjustment process. 106 is instructed.

  The image processing unit 106 receives a video signal (video data) input to the video processing apparatus 100. Further, the image processing unit 106 receives the image quality control information output from the control unit 105, and executes image quality adjustment processing on the video signal according to the image quality control information. The video signal whose image quality has been adjusted is output to the display unit 107 and displayed on the screen. In this embodiment, the image processing unit 106 performs a process of adjusting the luminance value of the video signal so that the target luminance value included in the image quality control information is obtained. As described above, the adjustment of the luminance value performed by the image processing unit 106 is not immediately changed to the target luminance value, but is processed so as to reach the target setting value step by step according to the adjustment amount A1 or A2 per unit time. To do. In other words, the image processing unit 106 uses the target setting value determined by the control unit 105 and the image quality adjustment amount per unit time to gradually improve the image quality adjustment processing of the video until the image quality corresponding to the target setting value is reached. Is an image processing means for executing. The control method of the video processing apparatus of the present embodiment is realized by the function of the processing unit provided in the video processing apparatus 100 shown in FIG.

  FIG. 2 is a diagram for explaining operation processing of the video processing apparatus 100 according to the first embodiment of the present invention. FIG. 2 shows an example of an operation processing flow of the video processing apparatus. After the video processing apparatus shown in FIG. 1 is turned on, in step S1 of FIG. 2, has the input switching detection unit 101 detected input signal switching (input switching), channel switching, or broadcast program switching by a user operation? Is determined (step S1). If the input switching detection unit 101 does not detect switching of the input signal, the detection operation is continued. When the input switching detection unit 101 detects switching of the input signal, the input switching detection unit 101 transmits the signal switching information to the time measurement unit 104, and proceeds to step S2.

  Next, the time measured by the time measuring unit 104 is reset, and time measurement is newly started. The measuring time is always output to the control unit 105 (step S2). Next, the external light change determination unit 103 acquires external light information indicating the illuminance around the video processing apparatus 100, and determines whether or not the external light (illuminance) has changed (step S3). The external light detection unit 102 periodically detects external light, and the external light change determination unit 103 recognizes whether or not the external light has changed using the detection result. The changed ambient illuminance is output to the control unit 105.

  When there is an input indicating that the illuminance has changed from the external light change determination unit 103, the control unit 105 determines whether or not the elapsed time at the time when the input occurs has reached a predetermined time threshold Th1. (Step S4). If the elapsed time is less than the time threshold Th1, the control unit 105 advances the process to step S5. If the elapsed time is equal to or greater than the time threshold Th1, the control unit 105 advances the process to step S6.

  In step S5, the control unit 105 determines a target luminance value based on the external light information input from the external light change determination unit 103, and gives an instruction to increase the target luminance value and the adjustment amount per unit time. The included image quality control information is output to the image processing unit 106. Then, the image processing unit 106 executes image quality adjustment processing with a predetermined adjustment amount A2 per unit time so that the target luminance value of the image quality control information output from the control unit 105 is obtained (step S7), and step S9. Proceed to

  On the other hand, in step S6, the control unit 105 determines a target luminance value based on the external light information input from the external light change determination unit 103, and outputs image quality control information including the target luminance value to the image processing unit 106. The process proceeds to step S8. In this embodiment, the image quality control information does not include an instruction regarding the adjustment amount per unit time, but it is needless to say that the image quality control information may include instruction information indicating that the adjustment is performed with a normal adjustment amount.

  In step S8, the image processing unit 106 executes image quality adjustment processing with a predetermined adjustment amount A1 per unit time so that the target luminance value of the image quality control information output from the control unit 105 is obtained, and the process proceeds to step S9. move on. In step S9, the video data whose luminance has been adjusted by the image processing unit 106 is output to the display unit 107 and displayed so that the user can view it.

  Although the control in the present embodiment has been described above, the image quality adjustment processing of the present invention will be described using FIG. 3 which is a conceptual diagram showing what adjustment is actually performed by this control.

  FIG. 3A is a diagram illustrating a change in illuminance around the video processing apparatus 100. In this figure, in order to simplify the description, the horizontal axis indicates the change in illuminance within a predetermined range after the user performs channel switching (channel selection operation).

  FIG. 3B is a diagram showing a transition state of the image quality adjustment result when the conventional image quality adjustment processing is applied when the change in illuminance as shown in FIG. 3A occurs. The horizontal axis represents time, and the vertical axis represents a set value of luminance (video luminance value) applied to the video. As is apparent from this figure, the luminance value is adjusted step by step until the target luminance value L is reached in response to the change in illuminance.

  On the other hand, FIG. 3C is a diagram showing a transition state of the image quality adjustment result when the image quality adjustment processing according to the present invention is applied. Since the change in illuminance occurs before the threshold Th1 elapses, the adjustment is performed using the adjustment amount A2. If the target luminance value L is exceeded when the adjustment is performed with the adjustment amount A2, the adjustment amount is limited when the target luminance value L is reached. On the other hand, if the illuminance changes after the threshold Th1 has elapsed, the image quality adjustment process is executed using the adjustment amount A1.

  The above-described video processing apparatus according to the present embodiment executes the following processing when performing the image quality adjustment processing on the video signal stepwise in accordance with the change in the lighting environment. The video processing device is suitable for the changed lighting environment when the user switches the channel or when the user changes the lighting environment within a predetermined time after the program being viewed changes. The adjustment amount per unit time is increased so that the adjustment time for image quality is shortened. As a result, it is possible to quickly shift to a video state desired by the user, and to improve user convenience.

  Note that if the illuminance changes before reaching the time threshold Th1, it is possible to perform image quality adjustment that directly changes to the target luminance value instead of stepwise adjustment. Since it will be noticed by the user, it is difficult to say that it is preferable. The present invention is based on the premise that the image quality is adjusted step by step so that both the quick adjustment and the user feel comfortable.

  In the first embodiment described above, one time threshold Th1 is set. However, in the present invention, there is no reason why the time threshold must be one. That is, more flexible adjustment can be performed by providing a plurality of time thresholds. For example, Th2 is provided as a time threshold longer than the time threshold Th1. When the time from the switching of the video signal to the change in illuminance is longer than Th1 and shorter than Th2, the adjustment amount is larger than A1 and the third adjustment amount A3 smaller than A2 is used to adjust the luminance. Adjustment processing may be executed. A plurality of predetermined times (time threshold values) to be compared with the change timing of the illuminance are determined, and the adjustment amount is determined so that the adjustment value per unit time corresponding to the predetermined time becomes smaller as each predetermined time becomes longer The same may be applied (the same applies to the second embodiment).

  Next, a video processing apparatus according to the second embodiment of the present invention will be described. The video processing apparatus 200 (FIG. 4A) according to the second embodiment is based on information indicating the genre of a program switched by input switching, channel selection operation, or program switching, and the degree of change in lighting environment. Determine whether the lighting has been intentionally changed. The video processing apparatus 200 adjusts the adjustment amount per unit time according to the determination result. The present embodiment aims to improve the accuracy for determining whether or not the user has intentionally changed the illumination. An example will be described in which the video processing device 200 acquires a broadcast wave program genre and determines whether the user has intentionally changed the lighting based on the acquired program genre. In the present invention, the information acquired by the video processing apparatus 200 is not limited to the broadcast wave program genre. Therefore, not only the genre information is acquired from the broadcast wave, but the video processing device 200 acquires information indicating the video content from an arbitrary video signal, and the user intentionally illuminates based on the acquired information indicating the video content. It may be determined whether or not is changed.

  FIG. 4 is a diagram illustrating a configuration example of the video processing apparatus according to the second embodiment of the present invention and an example of genre determination information. FIG. 4A shows a configuration example of the video processing apparatus 200 according to the second embodiment of the present invention. A video processing device 200 shown in FIG. 4A includes a program information acquisition unit 108 in addition to the processing units included in the video processing device 100 according to the first embodiment of the present invention shown in FIG. Among the processing units included in the video processing device 200 illustrated in FIG. 4A, those having the same reference numerals as the processing units included in the video processing device 100 illustrated in FIG. 1 are included in the video processing device 100 illustrated in FIG. 1. It has the same function as the processing unit. The control method of the video processing apparatus of the present embodiment is realized by the function of the processing unit included in the video processing apparatus 200 shown in FIG.

  The program information acquisition unit 108 acquires the program genre of the video signal from the input video signal 112, and sequentially transmits information including the acquired program genre to the control unit 105 as genre information 120. That is, the program information acquisition unit 108 functions as an acquisition unit that acquires genre information indicating the type of content of a video signal to which image quality adjustment processing is applied.

  Similar to the first embodiment, the control unit 105 determines whether or not a change in external light has occurred before the elapsed time after the signal switching has reached a predetermined time threshold Th1. When there is a change in external light, processing for determining an adjustment amount per unit time of luminance adjustment for the video signal is performed using genre determination information described later according to the genre information input from the program information acquisition unit 108. . Then, image quality control information including the determined adjustment amount per unit time and the target luminance value is output to the image processing unit 106.

  The image processing unit 106 that has received the image quality control information performs image quality adjustment (video signal luminance value adjustment) processing so that the target luminance value instructed by the control unit 105 is obtained. Similar to the first embodiment, in this embodiment, the luminance value is not changed immediately to the target luminance value, but is changed stepwise according to the adjustment amount per unit time.

  FIG. 4B shows an example of genre determination information. The genre determination information is table data in which a program genre after input switching / channel selection is associated with a rate of change from ambient illuminance immediately before input switching / channel selection. The genre determination information is stored in a memory (not shown) that can be accessed by the control unit 105. For example, when the program genre after input switching / channel selection is a movie, a condition value of 40% or more of illuminance reduction is associated with the ambient illuminance value immediately before input switching / channel selection. That is, this memory is a storage unit that stores determination information in which a condition value for the rate of change of external light is associated with genre information. That is, the genre determination information is obtained when a change equal to or higher than the change rate of the illuminance associated with each genre of a program newly displayed by channel selection or the like occurs within a predetermined specified time (threshold Th1). It is used to increase the amount of adjustment per unit time for obtaining a luminance value. Specifically, the control unit 105 determines that the change timing of the external light is before the elapse of a predetermined time and the change rate of the external light before and after the switching process corresponds to the genre information of the video signal after the switching. When the value is satisfied, the following processing is executed. The control unit 105 instructs the image processing unit 106 to execute the image quality adjustment process by increasing the adjustment amount per unit time.

  Subsequently, an operation processing flow of the video processing apparatus 200 according to the second embodiment will be described with reference to FIG. Steps S11 to S13, S15, and S17 to S21 in the operation process flow shown in FIG. 5 are the same as the processes of S1 to S3, S4, and S6 to S9 shown in FIG.

  In step S <b> 13, when the external light change determination unit 103 detects a change in external light (illuminance), the information is transmitted to the control unit 105. First, the control unit 105 acquires program genre information of the program being viewed. Then, when there is an input indicating that the illuminance has changed from the external light change determination unit 103, it is determined whether or not the elapsed time at the time when the input occurs has reached a predetermined time threshold value Th1 (step S1). S14). If the measurement time is equal to or greater than Th1, the control unit 105 moves the process to step S19.

  If a change in external light is detected before the measurement time reaches the predetermined time threshold Th1, the control unit 105 determines that the external light change rate is the degree of change determined by the genre determination information in step S16. It is determined whether the condition is satisfied. The external light change rate is information indicating how much external light has changed within a certain period. Further, as described above, the program genre information is sequentially input from the program information acquisition unit 108 to the control unit 105. From these pieces of information, for example, the control unit 105 determines subsequent processing based on how much the outside light has changed within a predetermined period after the movie program is displayed by the channel selection operation. If the external light change rate does not satisfy the condition defined in the genre information, the process proceeds to step S19.

  When the external light change rate satisfies the condition of the genre information, the control unit 105 sets the target luminance value from the detected illuminance information after the change, and the unit of the luminance value for reaching the target luminance value The adjustment amount per time is set to a large value as in the first embodiment. Also in the second embodiment, image processing is performed using an adjustment amount that satisfies A1 <A2 with respect to A1 that is a normal adjustment amount.

  As described above, in this embodiment, the illuminance change rate determined in advance according to the program genre is set as a condition for increasing the adjustment amount per unit time. As a result, it is possible to more reliably detect that the user has intentionally changed the lighting for a program genre that frequently changes the lighting. In addition, when the degree of change in illuminance satisfies the condition, by increasing the adjustment amount per unit time, as a result, it is possible to quickly shift to the video state desired by the user, and improve user convenience. be able to.

(Other examples)
The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, etc.) of the system or apparatus reads the program. It is a process to be executed. In this case, the program and the storage medium storing the program constitute the present invention.

DESCRIPTION OF SYMBOLS 101 Input switch detection part 102 External light detection part 103 External light change determination part 104 Time measurement part 105 Control part 106 Image processing part 107 Display part

Claims (12)

A video processing apparatus that performs image quality adjustment processing on a video signal according to external light,
Outside light detecting means for detecting outside light;
Switching detection means for detecting any switching process among switching of input of video signals to the video processing apparatus, switching of channels, switching of broadcast programs;
Measuring means for measuring the time from when the switching process is detected by the switching detection means;
Image processing means for performing image quality adjustment processing of the video signal based on a target set value set according to the external light detected by the external light detection means;
When the change timing of the external light detected by the external light detection unit is before a predetermined time has elapsed since the switching detection unit detected the switching process, the image is compared with the other cases. Control means for controlling the image quality adjustment processing by the processing means so as to increase responsiveness.   The video processing apparatus according to claim 1, wherein the control unit increases responsiveness of the image quality adjustment processing by the image processing unit by increasing an adjustment amount of image quality per unit time.   3. The video processing apparatus according to claim 1, wherein the image processing unit executes image quality adjustment processing of the video signal step by step until the image quality corresponding to the target setting value is reached. 4. The video processing apparatus according to claim 1, wherein the external light detection unit detects external light information including at least external illuminance or color temperature. 5. Acquisition means for acquiring genre information indicating the type of content of a video signal to which image quality adjustment processing is applied;
Storage means for storing determination information in which the condition value of the rate of change in outside light is associated with genre information;
In the control means, the change timing of the external light is before the lapse of the predetermined time, and the change rate of the external light before and after the switching process satisfies a condition value corresponding to the genre information of the video signal after the switching. 5. The video processing apparatus according to claim 1, wherein the image processing unit is instructed to increase the amount of adjustment per unit time and execute the image quality adjustment process. .   2. The predetermined amount of time is defined, and the amount of adjustment is determined such that the amount of adjustment per unit time corresponding to the predetermined time becomes smaller as each predetermined time becomes longer. The video processing device according to any one of 5 to 5. A control method of a video processing apparatus that performs image quality adjustment processing on a video signal according to external light,
An outside light detecting step for detecting outside light;
A switching detection step for detecting any switching process among switching of video signal input to the video processing device, switching of channels, switching of broadcast programs,
A measuring step for measuring a time from when the switching process is detected by the switching detection step;
An image processing step for executing an image quality adjustment process of the video signal based on a target set value set according to the external light detected by the external light detection step;
When the change timing of the external light detected in the external light detection step is before a predetermined time has elapsed since the switching process was detected in the switch detection step, the image is compared with the other cases. And a control step for controlling so as to increase the responsiveness of the image quality adjustment processing by the processing step.   8. The control of a video processing apparatus according to claim 7, wherein, in the control step, the responsiveness of the image quality adjustment process in the image processing step is increased by increasing an image quality adjustment amount per unit time. Method.   9. The method according to claim 7, wherein in the image processing step, image quality adjustment processing of the video signal is executed step by step until the image quality corresponding to the target setting value is reached. 10. The video processing apparatus control method according to claim 7, wherein in the external light detection step, external light information including at least external illuminance or color temperature is detected. The video processing apparatus includes storage means for storing determination information in which a condition value of a change rate of external light is associated with genre information,
Furthermore, the control method of the video processing apparatus includes an acquisition step of acquiring genre information indicating the type of content of the video signal to which the image quality adjustment process is applied,
In the control step, the change timing of the external light is before the lapse of the predetermined time, and the change rate of the external light before and after the switching process satisfies a condition value corresponding to the genre information of the video signal after the switching. 11. The video processing device according to claim 7, wherein the image processing step is controlled so that the image quality adjustment processing is executed by increasing an adjustment amount per unit time. Control method. The plurality of predetermined times are determined, and the adjustment amount is determined so that the adjustment amount per unit time corresponding to the predetermined time becomes smaller as each predetermined time becomes longer. The control method of the video processing apparatus of any one of 11 to 11.

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